Swift J1727.8–1613 Has the Largest Resolved Continuous Jet Ever Seen in an X-Ray Binary
Multiwavelength polarimetry and radio observations of Swift J1727.8–1613 at the beginning of its recent 2023 outburst suggested the presence of a bright compact jet aligned in the north–south direction, which could not be confirmed without high-angular-resolution images. Using the Very Long Baseline...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
American Astronomical Society
2024
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| _version_ | 1811140356446617600 |
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| author | Wood, CM Miller-Jones, JCA Bahramian, A Tingay, SJ Prabu, S Russell, TD Atri, P Carotenuto, F Altamirano, D Motta, SE Hyland, L Reynolds, C Weston, S Fender, R Körding, E Maitra, D Markoff, S Migliari, S Russell, DM Sarazin, CL Sivakoff, GR Soria, R Tetarenko, AJ Tudose, V |
| author_facet | Wood, CM Miller-Jones, JCA Bahramian, A Tingay, SJ Prabu, S Russell, TD Atri, P Carotenuto, F Altamirano, D Motta, SE Hyland, L Reynolds, C Weston, S Fender, R Körding, E Maitra, D Markoff, S Migliari, S Russell, DM Sarazin, CL Sivakoff, GR Soria, R Tetarenko, AJ Tudose, V |
| author_sort | Wood, CM |
| collection | OXFORD |
| description | Multiwavelength polarimetry and radio observations of Swift J1727.8–1613 at the beginning of its recent 2023 outburst suggested the presence of a bright compact jet aligned in the north–south direction, which could not be confirmed without high-angular-resolution images. Using the Very Long Baseline Array and the Long Baseline Array, we imaged Swift J1727.8–1613 during the hard/hard-intermediate state, revealing a bright core and a large, two-sided, asymmetrical, resolved jet. The jet extends in the north–south direction, at a position angle of −0.60° ± 0.07° east of north. At 8.4 GHz, the entire resolved jet structure is ∼110(d/2.7kpc)/sini au long, with the southern approaching jet extending ∼80(d/2.7kpc)/sini au from the core, where d is the distance to the source and i is the inclination of the jet axis to the line of sight. These images reveal the most resolved continuous X-ray binary jet, and possibly the most physically extended continuous X-ray binary jet ever observed. Based on the brightness ratio of the approaching and receding jets, we put a lower limit on the intrinsic jet speed of β ≥ 0.27 and an upper limit on the jet inclination of i ≤ 74°. In our first observation we also detected a rapidly fading discrete jet knot 66.89 ± 0.04 mas south of the core, with a proper motion of 0.66 ± 0.05 mas hr−1, which we interpret as the result of a downstream internal shock or a jet–interstellar medium interaction, as opposed to a transient relativistic jet launched at the beginning of the outburst. |
| first_indexed | 2024-09-25T04:20:41Z |
| format | Journal article |
| id | oxford-uuid:8708f5c0-f283-4af5-b4ea-5ab1e6b18d56 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-09-25T04:20:41Z |
| publishDate | 2024 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | oxford-uuid:8708f5c0-f283-4af5-b4ea-5ab1e6b18d562024-08-05T19:37:21ZSwift J1727.8–1613 Has the Largest Resolved Continuous Jet Ever Seen in an X-Ray BinaryJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:8708f5c0-f283-4af5-b4ea-5ab1e6b18d56EnglishJisc Publications RouterAmerican Astronomical Society2024Wood, CMMiller-Jones, JCABahramian, ATingay, SJPrabu, SRussell, TDAtri, PCarotenuto, FAltamirano, DMotta, SEHyland, LReynolds, CWeston, SFender, RKörding, EMaitra, DMarkoff, SMigliari, SRussell, DMSarazin, CLSivakoff, GRSoria, RTetarenko, AJTudose, VMultiwavelength polarimetry and radio observations of Swift J1727.8–1613 at the beginning of its recent 2023 outburst suggested the presence of a bright compact jet aligned in the north–south direction, which could not be confirmed without high-angular-resolution images. Using the Very Long Baseline Array and the Long Baseline Array, we imaged Swift J1727.8–1613 during the hard/hard-intermediate state, revealing a bright core and a large, two-sided, asymmetrical, resolved jet. The jet extends in the north–south direction, at a position angle of −0.60° ± 0.07° east of north. At 8.4 GHz, the entire resolved jet structure is ∼110(d/2.7kpc)/sini au long, with the southern approaching jet extending ∼80(d/2.7kpc)/sini au from the core, where d is the distance to the source and i is the inclination of the jet axis to the line of sight. These images reveal the most resolved continuous X-ray binary jet, and possibly the most physically extended continuous X-ray binary jet ever observed. Based on the brightness ratio of the approaching and receding jets, we put a lower limit on the intrinsic jet speed of β ≥ 0.27 and an upper limit on the jet inclination of i ≤ 74°. In our first observation we also detected a rapidly fading discrete jet knot 66.89 ± 0.04 mas south of the core, with a proper motion of 0.66 ± 0.05 mas hr−1, which we interpret as the result of a downstream internal shock or a jet–interstellar medium interaction, as opposed to a transient relativistic jet launched at the beginning of the outburst. |
| spellingShingle | Wood, CM Miller-Jones, JCA Bahramian, A Tingay, SJ Prabu, S Russell, TD Atri, P Carotenuto, F Altamirano, D Motta, SE Hyland, L Reynolds, C Weston, S Fender, R Körding, E Maitra, D Markoff, S Migliari, S Russell, DM Sarazin, CL Sivakoff, GR Soria, R Tetarenko, AJ Tudose, V Swift J1727.8–1613 Has the Largest Resolved Continuous Jet Ever Seen in an X-Ray Binary |
| title | Swift J1727.8–1613 Has the Largest Resolved Continuous Jet Ever Seen in an X-Ray Binary |
| title_full | Swift J1727.8–1613 Has the Largest Resolved Continuous Jet Ever Seen in an X-Ray Binary |
| title_fullStr | Swift J1727.8–1613 Has the Largest Resolved Continuous Jet Ever Seen in an X-Ray Binary |
| title_full_unstemmed | Swift J1727.8–1613 Has the Largest Resolved Continuous Jet Ever Seen in an X-Ray Binary |
| title_short | Swift J1727.8–1613 Has the Largest Resolved Continuous Jet Ever Seen in an X-Ray Binary |
| title_sort | swift j1727 8 1613 has the largest resolved continuous jet ever seen in an x ray binary |
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